Re: [PATCH 03/10] usb: catch attempts to submit urbs with a vmalloc'd transfer buffer

[Dan Williams]

On Thu, May 8, 2014 at 9:25 AM, Mathias Nyman
<mathias.nyman@xxxxxxxxxxxxxxx> wrote:
> From: Dan Williams <dan.j.williams@xxxxxxxxx>
>
> Save someone else the debug cycles of figuring out why a driver's
> transfer request is failing or causing undefined system behavior.
> Buffers submitted for dma must come from GFP allocated / DMA-able
> memory.
>
> Return -EAGAIN matching the return value for dma_mapping_error() cases.
>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Cc: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
> Cc: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>

Thanks Mathias.

One note, this was acked-by Alan here:

http://marc.info/?l=linux-usb&m=139327920501989&w=2
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